Deep shaft control point transmission anti-explosion protective cover

Abstract

The utility model relates to a deep shaft excavation control point transmission anti-explosion protection cover device, in particular to a deep shaft excavation control point transmission anti-explosion protection cover device which structurally comprises three L-shaped fixing gaskets (1). A stainless steel plate is processed into a semicircular anti-explosion protection cover (2), the anti-explosion protection cover (2) is vertically bent to form a U shape, the width of an inner opening is 12 cm, and the length is 14.5 cm; a control point fixing plate (3) with the length of 12cm and the width of 10cm is arranged in the semi-circle and is welded in the semi-circle; the high-precision Lycra Leica reflective sticker (4) is pasted on the control point fixing plate (3), and the specification of the high-precision Lycra Leica reflective sticker (4) is 10 * 10 cm; wherein three L-shaped fixing gaskets (1) are fixedly welded at the 180-degree position and the 90-degree position of the fixed end of the anti-explosion protection cover (2). Due to the standardized component design and the reasonable size specification, the device can adapt to the environments of deep shafts with different depths and different diameters, and has wide universality.

Description

Technical Field

[0001] This invention relates to the field of vertical shaft excavation measurement control point technology, and in particular to a blast-proof protective cover for transmitting control points in deep vertical shafts. Background Technology

[0002] In the current domestic energy development landscape, pumped storage power stations, as a key energy storage facility, are ushering in a golden age of vigorous development. They play a crucial role in balancing power supply and demand and improving grid stability.

[0003] As development progresses, the scale and technical complexity of pumped storage power stations continue to increase. Among these, the depth of the water intake shaft, a crucial component of the entire system, is also continuously increasing. This increased shaft depth presents numerous challenges, particularly in surveying. Measurement control points serve as the benchmark for precise positioning and orientation during subsequent construction; their accuracy and stability directly impact the quality and safety of the entire shaft and even the entire power station project.

[0004] However, in actual construction scenarios, the internal environment of shafts is extremely complex and harsh. On the one hand, due to the considerable depth of shafts, traditional methods of setting up and maintaining measurement control points are insufficient. The accuracy of transmission between control points accumulates with increasing depth, making the transmission process extremely difficult. On the other hand, shaft construction often involves blasting operations. The powerful impact, flying rocks, and vibrations can easily damage the already fragile and precise measurement control points within the shaft. Once control points are damaged, resetting and calibrating them is not only time-consuming and labor-intensive but also delays the construction period and increases project costs.

[0005] To address this challenge, engineers, through repeated research and practical exploration, explored an innovative protective measure: installing stainless steel plates above the control points. The stainless steel plates, with their superior strength, impact resistance, and corrosion resistance, effectively block flying rocks and reduce vibrations during blasting in the shaft, creating a robust protective barrier for the measurement control points within the shaft. This ensures the control points remain stable and reliable even in complex construction environments, thereby guaranteeing the smooth progress of the entire pumped storage power station's water intake shaft project. Summary of the Invention

[0006] This invention provides a deep vertical shaft control point transfer explosion-proof protective cover, the structure of which includes: 3 L-shaped fixing pads (1); a semi-circular explosion-proof protective cover (2) made of stainless steel plate, the explosion-proof protective cover (2) being vertically bent to form a U-shape, with an inner width of 12cm and a length of 14.5cm; a control point fixing plate (3) with a length of 12cm and a width of 10cm built in, welded inside the semi-circle; and a high-precision Leica reflective sticker (4) with a specification of 10 * 10cm pasted on the control point fixing plate (3); wherein, 3 L-shaped fixing pads (1) are fixedly welded at the 180-degree and 90-degree positions of the fixed end of the explosion-proof protective cover (2).

[0007] When using it, select a suitable location on the tunnel wall, drill holes on the tunnel wall corresponding to the L-shaped fixing shims using an impact drill, and fix the protective cover inside the shaft wall with expansion bolts as a measurement control point for shaft excavation. Use a total station to carry out excavation and layout inside the shaft.

[0008] The material of the L-shaped fixing pad (1) is the same as or compatible with the material of the explosion-proof protective cover (2) to ensure the welding firmness and overall structural stability. Its L-shaped size design should be able to fit tightly against the vertical shaft wall to achieve reliable fixing.

[0009] The stainless steel plate is processed into a semi-circle, and a small steel plate is welded inside the semi-circle. Measurement reflective stickers are pasted on the steel plate, and three L-shaped shims are welded to the protective cover. The shims are fixed inside the shaft wall with three expansion bolts as measurement control points for shaft excavation. Excavation and layout are carried out inside the shaft using a total station.

[0010] The principle and method of use of this invention: The measurement control point with a protective cover is used as the basic control point in the vertical shaft. The purpose of adding the protective cover is to protect the measurement control point from being damaged by the blasting inside the shaft.

[0011] The beneficial effects of this invention are as follows: Due to the large elevation angle inside the shaft, it is not advisable to transfer the measurement control points to the excavation face. Each transfer of control points is time-consuming and labor-intensive, and delays on-site construction. Therefore, protecting the measurement control points already transferred to the face is particularly important. The higher the accuracy of the measurement control points, the better the control over-excavation and under-excavation after excavation and blasting. Excessive over-excavation will increase the amount of concrete poured later, thus increasing construction costs. Similarly, if under-excavation exists, it will require under-excavation treatment inside the shaft, which is not only time-consuming but also delays the construction progress. In addition, treating under-excavation will also cause over-excavation of the surrounding shaft walls. Therefore, protecting the measurement control points will greatly reduce these problems.

[0012] (I) Accurate Measurement Guarantee

[0013] The high-precision Leica reflective tape (4) has extremely high reflectivity. Its size is 10 * 10cm. It can accurately reflect the measuring light emitted by the total station, ensuring the accuracy of the measurement data, providing a reliable benchmark for shaft excavation and layout, effectively reducing construction deviations caused by measurement errors, and ensuring that shaft construction is carried out accurately according to design requirements.

[0014] The control point fixing plate (3) is 12cm long and 10cm wide, providing a stable attachment surface for the reflective sticker, ensuring that the reflective sticker remains fixed in the complex construction environment, further maintaining the stability of the measurement benchmark, so that the control point can be accurately located every time the measurement is performed, and improving the accuracy of the entire measurement and control system.

[0015] (ii) Strong explosion-proof protection

[0016] The semi-circular explosion-proof protective cover (2) made of stainless steel plate utilizes the excellent strength, impact resistance and corrosion resistance of stainless steel to effectively resist the strong impact force and flying rock attack during blasting in the vertical shaft, providing all-round protection for the built-in control point fixing plate (3) and high-precision Leica reflective tape (4). Its vertical bending to form a U-shape, with an inner opening width of 12cm and a length of 14.5cm, not only ensures that the internal space is sufficient to accommodate the control point-related components, but also disperses the impact force through a reasonable mechanical structure, minimizing the impact of blasting vibration on the control point.

[0017] Three L-shaped fixing pads (1) are fixedly welded at 180 degrees and 90 degrees on the fixing end of the explosion-proof protective cover (2). This multi-point fixing and L-shaped design allows the protective cover to be firmly attached to the shaft wall, preventing displacement or falling off under the impact of explosion, ensuring the continuity and reliability of the protective effect, and laying the foundation for long-term stable measurement work in the shaft.

[0018] (III) Convenient installation and versatility

[0019] The invention is simple to use. Simply select a suitable location on the shaft wall, drill holes in the shaft wall corresponding to the L-shaped fixing pads using an impact drill, and then use expansion bolts to quickly fix the protective cover inside the shaft wall. No complicated professional installation tools and techniques are required. Ordinary construction workers can operate it after simple training, which greatly improves construction efficiency and reduces the delays caused by complicated installation procedures.

[0020] Its standardized component design and reasonable size specifications enable it to adapt to deep shaft environments of different depths and diameters, giving it wide versatility. Whether it is a shaft for a small pumped storage power station or a shaft for a large project, it can be easily installed and used, providing a unified and effective solution for the protection of measurement control points in the construction of various deep shafts. Attached Figure Description

[0021] Figure 1 3D diagram;

[0022] Figure 2 1. 3D structural diagram;

[0023] Figure 3 1. Front view of the invention;

[0024] Figure 4 Side view;

[0025] Figure 5 Top view;

[0026] Figure 6 Usage status diagram;

[0027] The components include: 1. L-shaped fixing pads, 2. Explosion-proof protective covers, 3. Control point fixing plates, and 4. High-precision Leica reflective tape. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0029] Example 1, as shown in the figure, includes a deep vertical shaft control point transfer explosion-proof protective cover, comprising three L-shaped fixing pads (1), a semi-circular explosion-proof protective cover (2) made of stainless steel plate, a control point fixing plate (3) welded inside the semi-circle with a small steel plate, and high-precision Leica reflective stickers (4) pasted on the control point fixing plate. Its structure is as follows: three L-shaped fixing pads (1) are fixedly welded at 180-degree and 90-degree positions on the fixed end of the explosion-proof protective cover (2); the control point fixing plate (3) inside the explosion-proof protective cover (2) is welded inside the semi-circle; and high-precision Leica reflective stickers (4) are pasted on the control point fixing plate (3). The explosion-proof protective cover (2) is vertically bent to form a U-shape, with an inner width of 12cm and a length of 14.5cm.

[0030] The length of the control point fixing plate (3) is 12cm and the width is 10cm.

[0031] The high-precision Leica reflective film (4) has a size of 10*10cm.

[0032] The method of using this invention is as follows: Select a suitable location on the tunnel wall, drill holes on the tunnel wall corresponding to the L-shaped fixing shims using an impact drill, fix the protective cover inside the shaft wall with expansion bolts to serve as a measurement control point for shaft excavation, and use a total station to excavate and set out inside the shaft.

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A blast-proof protective cover for control point transmission in deep vertical shafts, characterized in that, include: 3 L-shaped fixing pads (1); A semi-circular explosion-proof protective cover (2) is made of stainless steel plate. The explosion-proof protective cover (2) is vertically bent to form a U-shape with an inner opening width of 12cm and a length of 14.5cm. A control point fixing plate (3) with a length of 12cm and a width of 10cm is built in and welded inside the semicircle; A high-precision Leica reflective sticker (4) with a size of 10 * 10cm is pasted on the control point fixing plate (3); Among them, three L-shaped fixing pads (1) are fixedly welded at the 180-degree and 90-degree positions of the fixed end of the explosion-proof protective cover (2).

2. The explosion-proof protective cover for control point transmission in deep vertical shafts according to claim 1, characterized in that, When using it, select a suitable location on the tunnel wall, drill holes on the tunnel wall corresponding to the L-shaped fixing shims using an impact drill, and fix the protective cover inside the shaft wall with expansion bolts as a measurement control point for shaft excavation. Use a total station to carry out excavation and layout inside the shaft.

3. The explosion-proof protective cover for control point transmission in deep vertical shafts according to claim 1, characterized in that, The material of the L-shaped fixing pad (1) is the same as or compatible with the material of the explosion-proof protective cover (2) to ensure the welding firmness and overall structural stability. Its L-shaped size design should be able to fit tightly against the vertical shaft wall to achieve reliable fixing.

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